CO2 Emission and Organic Carbon Pools in Soils of the Northern Taiga Ecosystems of Western Siberia under Different Geocryological Conditions
- 作者: Bobrik A.1, Ryzhova I.1, Goncharova O.1, Matyshak G.1, Makarov M.1, Walker D.2
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隶属关系:
- Lomonosov Moscow State University
- Alaska Fairbanks University
- 期: 卷 51, 编号 6 (2018)
- 页面: 628-636
- 栏目: Soil Chemistry
- URL: https://journals.rcsi.science/1064-2293/article/view/224563
- DOI: https://doi.org/10.1134/S1064229318060042
- ID: 224563
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详细
Statistical analysis of a vast body of data collected during five field seasons (2011–2015) was performed to characterize the biological activity of soils in the northern taiga ecosystems of Western Siberia. Automorphic forest soils, hydromorphic (oligotrophic bog) soils, and semihydromorphic (flat-topped and large peat mounds) soils were characterized. Statistically significant differences of average levels of CO2 emission from the soils were identified at the ecosystem level. The CO2 emission from podzols of automorphic forest ecosystems at the peak of the growing season (205 ± 30 to 410 ± 40 mg CO2/(m2 h)) was significantly higher than the emission from semihydromorphic soils of peat mounds (70 ± 20 to 116 ± 10 mg CO2/(m2 h)). The presence and depth of permafrost was a significant factor that affected ecosystem diversity and biological activity of northern taiga soils. Statistically significant differences in the total, labile, and microbial carbon pools were observed for the studied soils. Labile and microbial carbon pools in the organic layer (10 cm) of forest podzols amounted to 0.19 and 0.66 t/ha, respectively; those in the organic layer (40 cm) of peat cryozems of flat-topped peat mounds reached 1.24 and 3.20 t/ha, and those in the oligotrophic peat soils (50 cm) of large peat mounds were 2.76 and 1.35 t/ha, respectively. The portion of microbial carbon in the total carbon pool (Cmicr/Ctot, %) varied significantly; according to the values of this index, the soils were arranged into the following sequence: oligotrophic peat soil < peat cryozem < podzol.
作者简介
A. Bobrik
Lomonosov Moscow State University
编辑信件的主要联系方式.
Email: ann-bobrik@yandex.ru
俄罗斯联邦, Moscow, 119991
I. Ryzhova
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
俄罗斯联邦, Moscow, 119991
O. Goncharova
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
俄罗斯联邦, Moscow, 119991
G. Matyshak
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
俄罗斯联邦, Moscow, 119991
M. Makarov
Lomonosov Moscow State University
Email: ann-bobrik@yandex.ru
俄罗斯联邦, Moscow, 119991
D. Walker
Alaska Fairbanks University
Email: ann-bobrik@yandex.ru
美国, 1731 South Chandalar Drive, Fairbanks, AK, 99775